Device for the guiding of individual reinforcement threads

ABSTRACT

An arrangement ( 1 ) for guiding individual reinforcement filaments ( 2 ) onto a carrier ( 3 ) has a positioning disc ( 4 ) with a plurality of filament guides ( 9 ) arranged distributed on a circular ring of the positioning disc ( 4 ). The carrier is moveable in the direction of the carrier axis (X). The arrangement also includes a rotationally symmetrical deflecting element ( 5 ). The positioning disc ( 4 ) and the deflecting element ( 5 ) each concentrically surround the carrier ( 3 ). The deflecting element ( 5 ) is mounted within the positioning disc ( 4 ) and aligned axially to the positioning disc ( 4 ). The inlet-end peripherally extending inner edge ( 6 ) of the deflecting element ( 5 ) faces toward the carrier ( 3 ) and is curved. The filament guides ( 9 ) open directly at the curved inner edge ( 6 ).

The invention relates to an arrangement for guiding individualreinforcement filaments onto a carrier which can be advanced in thedirection of the carrier axis.

An arrangement is known, for example, from DE 198 46 852 C2 and is usedespecially for a bobbin creel for working in individual reinforcementfilaments into a hose blank. A rubber hose is extruded onto a mandrel inan endless method. A dense layer of filaments is spiraled onto thisfirst rubber layer in that a bobbin creel rotates about the carrierformed of mandrel and rubber hose. By advancing the carrier in the axialdirection thereof, a spirally-shaped filament layer is formed having afilament angle which is dependent upon the advancing speed and therotational speed of the bobbin creel.

From DE 198 46 852 C2, it is known that the filaments are guided througha row of holes which are arranged equidistantly from each other on aperipheral line of a positioning ring. One reinforcement filament isguided radially inwardly through each hole. The positioning ringconcentrically surrounds or encloses a rotation-symmetric, funnel-shapeddeflecting element. The deflecting element has a continuously taperingchannel having an annularly-shaped inlet opening and a smallerannularly-shaped outlet opening. The reinforcement filaments are guidedon the radially inner surface of the deflecting element onto the carrierwhich is surrounded by the deflecting element.

It has been shown that threading through holes is very work intensive.Furthermore, the reinforcement filaments run freely and unguided betweenthe holes in the positioning ring and the carrier on a relatively longradial inner surface. This is so because the positioning ring must havea large diameter in order to accommodate all bores. In this way, noconstant spacing of the reinforcement filaments on the carrier can beensured. In addition, it is possible that individual reinforcementfilaments cross over each other.

The object of the invention is therefore to provide an improvedarrangement for guiding individual reinforcement filaments with whichthe above disadvantages are solved.

The object is solved by:

a positioning disc having a plurality of filament guides arrangeddistributed on the circular ring of the positioning disc; and, arotation-symmetrical deflecting element.

The positioning disc and the deflecting element each surround thecarrier concentrically. The deflecting element is mounted within thepositioning disc and is aligned axially to the positioning disc. Theperipherally-extending inner edge of the deflecting element faces at theinlet end toward the carrier and is curved and the filament guides ofthe positioning disc open directly at the end face of the curved inneredge.

The diameter, on which the reinforcement filaments are guided, can besignificantly reduced by the use of a positioning disc with slots inlieu of a position ring with bores. The positioning disc surrounds thedeflecting element. In this way, the distance is considerably reduced onwhich the reinforcement filaments run free and unguided between thefilament guides and the carrier and a migration and crossing of thefilaments is prevented. The work intensive threading of thereinforcement filaments in the bores is substituted by the better andmore rapid placement of the filaments in the slits.

Advantageously, the filament guides are configured of struts or websextending radially or mounted inclined. In this way, the number ofreinforcement filaments, which are guidable with the arrangement, isconsiderably increased compared to bores because only a strut with a lowthickness is needed between the slits and the reinforcement filamentscan be easily placed in the slits.

Preferably, a circular band-shaped cover disc can be releasably, forexample, magnetically, mounted on the surface of the positioning disc inthe region of the filament guides. The cover disc prevents that thefilaments slip out of the filament through-guide openings, especiallythe slits.

For threading reinforcement filaments into the arrangement whenpreparing a spiralizing arrangement, it is advantageous when a coverdisc with a slit, which extends radially, is mounted on the surface ofthe positioning disc in the region of the filament through-guideopenings. In the area of the slit, reinforcement filaments can bethreaded in this manner while the already threaded reinforcementfilaments are reliably held by the cover disc. The cover disc ispreferably magnetically adherable to the positioning disc especially forfacilitating the preparation operation and can be rotated from slit toslit.

The invention will be explained in greater detail below with respect tothe attached drawings.

FIG. 1 shows a cross-sectional view of the arrangement of the inventionfor guiding individual reinforcement filaments;

FIG. 2 is a front view of the arrangement of FIG. 1;

FIG. 3 is a detail view of a portion of FIG. 2.

FIG. 1 shows an arrangement 1 for guiding individual reinforcementfilaments 2 onto a carrier 3 which is advanced in the direction of thecarrier axis X. The carrier 3 is concentrically surrounded by thearrangement 1.

The arrangement 1 has a positioning disc 4 having a plurality offilament guides which are configured as struts extending radiallyoutwardly. The filament guides are distributed equidistantly from eachother on the circular ring of the positioning disc 4.

A rotational symmetrical deflecting element 5 is axially mounted belowthe positioning disc 4. The inner edge 6 of the deflecting element 5faces the carrier 3 on the run-in side and is curved so that thereinforcement filaments 2 are deflected at an angle onto the carrier 3.The filament guides of the positioning disc 4 are mounted in such amanner with respect to the deflecting element 5 that the reinforcementfilaments 2 are guided directly to the end face of the curved inner edge6 and the distance is shortened in which the filaments 2 run freely fromthe filament guides to the carrier 3. Furthermore, a lateral migrationand overlayering of the filaments 2 is prevented by a small deflectingsurface of the inner edge 6 and a very small air gap to the carrier 3.

In the embodiment shown, the deflecting element 5 is in the form of asleeve pushed into the positioning disc 4.

FIG. 2 shows a front view of the arrangement 1. A circular annular coverdisc 7 is magnetically adherable to the surface of the positioning disc4 in the region of the filament guides. The cover disc 7 has an assemblyslit 8 in order to clear at least one selected filament guide and tomake possible a threading of a reinforcement filament 2 into thefilament guide on the carrier 3. For preparing a bobbin creel, the coverdisc 7 is successively rotated and the reinforcement filaments 2 aresequentially guided through the corresponding filament guides. The coverdisc 7 prevents that already threaded reinforcement filaments 2 canagain become disengaged from the filament passthrough opening.

FIG. 3 shows a detail view of the positioning disc having a magneticallyadhered cover disc 7. The filament guides 9 can be seen in the region ofthe assembly slit 8 of the cover disc 7. The filament guides 9 areformed by struts extending radially outwardly. The reinforcementfilaments 2 can therefore be easily placed in the slits.

1-5. (canceled)
 6. An arrangement for guiding individual reinforcementfilaments onto a carrier defining a carrier axis (X) with said carrierbeing moveable in the direction of said carrier axis (X), thearrangement comprising: a positioning disc having a plurality offilament guides arranged distributed on a circular ring of saidpositioning disc; a rotation-symmetrical deflecting element; saidpositioning disc and said deflecting element each concentricallyenclosing said carrier; said deflecting element being mounted withinsaid positioning disc and being axially aligned to said positioningdisc; said deflecting element having an end face and aperipherally-extending curved inner edge formed on said end face andsaid curved inner edge being toward said carrier at the run-in end; and,said filament guides opening directly at said curved inner edge.
 7. Thearrangement of claim 6, wherein said filament guides are configured bystruts extending radially or mounted inclined.
 8. The arrangement ofclaim 6, further comprising a circular band-shaped cover disc which canbe releasably assembled on the surface of the positioning disc in theregion of the filament guides.
 9. The arrangement of claim 8, whereinsaid cover disc has a radially extending slit.
 10. The arrangement ofclaim 8, wherein said cover disc is magnetically adherable to thepositioning disc.